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Why calcium is better than sodium in eli...

Why calcium is better than sodium in eliminating small amount of water from alcohol?

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Both Na and Ca react with water to form the corresponding hydroxide. However, sodium rapidly reacts with alcohol to form sodium ethoxide (`NaOC_2 H_5` ) but calcium reacts quite slowly with alcohol.
`2C_2H_5OH + 2Na to 2C_2 H_5OH Na + H_2 uarr`
Thus, for eliminating small amount of water from alcohol, calcium is better than sodium.
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